Improvement in locomotive smoke-stacks



STATES PATENT FMC-it SETE HAM, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO HIMSELF AND WILLIAM H. MCGAFFERTY, OF ALEXANDRIA, VIRGINIA. i

llVllPPtOVEMEN'l' IN LOCOMOTIVE SWlOKE-STACKS.

Specification forming part of Letters Patent No. ldd, dated November 22,1864.

T0 u-Zlwhom t may concern:

Be it known that I, SE'rH HAM, of Philadelphia, Pennsylvania, haveinvented an Improvement in Locomotive-Stacks; and I do hereby declarethe following to be a full, clear, and exact description ot' the same,reference being had to the accompanying drawings, and to theletters ot'reference marked thereon.

My invention consists, first, in a deiiecting-plate and inner casing soformed and ar ranged in respect to the inner pipe and outer casing of alocomotive-stack, that the steam and products of combustion i'rom thepipe will be directed tirst to the lower part of the stack, and then tothe top of the latter, a uniform blast being thereby produced; secondly,in certain plates and an inner casing, formed and arranged substantiallyas described hereinafter, to arrest the sparks and prevent their escapefrom the stack.

ln order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation.

On reference to the accompanyingl drawings, which form a part ot' thisspecilication, Figure l is a vertical section of my improvedocomotive-stack, and Fig. 2 a sectional plan on the line l 2, Fig. l.

A is the inside pipe, which is secured to the locomotive in the usualmanner, and is surrounded by a 'unnelshaped casing, B, at the upper endot' which is a vertical liange, a.. rIlie casing Bis closed at the lowerend, and to the top of the liange a is secured a plate, D, in the centerot' which is a circular opening, b, and round the edge of the latterextends a i'lange, d, for a purpose described hereinafter. With inthecasing B, and surrounding the pipe A, is a funnelshaped inner casing, D,open at its lower end, und having at the top a vertical liange, e, thelatter being attached to the outer casing by stays j', the lower end otthe casing D being connected to the pipe A by stays g.

The stacks heretofore used have been so constructed that a partialvacuum is formed within the stack after each discharge of the steam fromthe exhaust-pipes, the tendency of the vacuum thus formed being, tor aninstant, to greatly increase the draft, which, therefore, instead ofcontinuing in an uniform current, consists of an irregular succession ofpuffs at great-er or less intervals, as the speed of the enginediminishes or increases, the iire being caused to burn away more quicklyin some places than at others, creating sparks in such quantities thatit is impossible to prevent large numbers from escaping from the stack.

In my improved stack the steam and products of combustion from the pipeA will be thrown against the under side ofthe plate E, and will bedeiiected downward by the latter until they strike the inner side of thecasing D. Between this casing and the pipe A they will continueto passdownward and through the bottom of the casing, then upward (as shown bythe arrows) between the casings I) and B into the upper part ot' thestack, from which they escape through the opening` between the plate Eand the lower edge ofthe iiange d, passingthence out of the stackthrough the opening l).

It will thus be seen that the steam and products of combustion, afterescaping from the pipe A, are rst carried to the lower part of thestack, and thence to the top, and that such particles of dust or sparksas may be thrown from the pipe A will he deiiected downward by the plateE and deposited in the lower part of the stack, or will be carriedupward between the casings B and D to the upper part of the stack, fromwhich they will fall after striking against the top plate, C, on thelian ge d.v I have found by experiment, however, that with a stackconstructed in the manner above described but few sparks are produced,the steam and products of combustion being retained within the stack forsuch a length ot' time after their escape i'rom the pipe A, that auniform draft is created, the fire burning regularly over its entiresurface, and giving oit' but few sparks.

I claim as my invention and desire to secure by Letters Patent- 1. Thecurved delecting-plate E, and inner funnel shaped casin g, D, arrangedinrespect to the inside pipe, A, and outer casing, B, substantially' asand for the purpose specified.

2. The plate E, inner easing, D, and plate C., with its liange d,arranged in respect to each other and the inner pipe and outer casingsubstantially, as set forth, for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence ot' two subscribing witnesses.

Titnesses CHARLES E. FOSTER, J onu WHITE.

BETH HAM.

